Here I want to share you how we can add items from CheckBox
List to ListBox. It’s very simple just look at the below code and you will get
to know how simple it is.
.aspx code:
<fieldset >
<legend>Add/Remove ListBox Item </legend>
<asp:CheckBoxList ID="cblItems"
runat="server"
RepeatColumns="2"
RepeatDirection="Horizontal">
<asp:ListItem Value="1">One</asp:ListItem>
<asp:ListItem Value="2">C#</asp:ListItem>
<asp:ListItem Value="3">C++</asp:ListItem>
<asp:ListItem Value="4">Pearl</asp:ListItem>
<asp:ListItem Value="5">Ruby</asp:ListItem>
<asp:ListItem Value="6">Python</asp:ListItem>
<asp:ListItem Value="7">J#</asp:ListItem>
</asp:CheckBoxList>
<asp:Button ID="btnAdd" runat="server"
Text="Add"
OnClick="AddItem"
/>
<asp:Button ID="bntRemove"
runat="server"
Text="Remove"
OnClick="RemoveItem"
/>
<asp:ListBox ID="lstAddedItem"
runat="server"
SelectionMode="Multiple"></asp:ListBox>
<asp:Literal ID="ltMessage"
runat="server"
Visible="false"></asp:Literal>
</fieldset>
.aspx.cs code:
//On Add Item Click Event
protected void
AddItem(object sender, EventArgs
e)
{
this.AddListItemFromCheckBoxList(cblItems,
lstAddedItem);
ltMessage.Visible = true;
ltMessage.Text = "List Item added
successfully!";
}
//On Remove Item Click Event
protected void
RemoveItem(object sender, EventArgs e)
{
this.RemoveListItemFromCheckBoxList(lstAddedItem);
ltMessage.Visible = true;
ltMessage.Text = "List Item removed
successfully!";
}
//Add List Item From CheckBoxList Item
protected void
AddListItemFromCheckBoxList(CheckBoxList chkList,
ListBox lstTobeAdded)
{
for (int i = 0; i
< chkList.Items.Count; i++)
{
if (chkList.Items[i].Selected == true)
{
ListItem li = new ListItem();
li.Value = chkList.Items[i].Value;
li.Text = chkList.Items[i].Text;
if
(!lstTobeAdded.Items.Contains(li)) //prevent for duplicate item
{
lstTobeAdded.Items.Add(li); //add to list
item.
}
}
}
}
//Remove List Item (selected) From ListBox
Item
protected void
RemoveListItemFromCheckBoxList(ListBox
lstTobeAdded)
{
for (int i = 0; i
< lstTobeAdded.Items.Count; i++)
{
if (lstTobeAdded.Items[i].Selected == true) //check if listBox item is selected
{
lstTobeAdded.Items.RemoveAt(i); //remove ListBox
item from current selection
}
}
}
I hope it will help you out. Feel free to post your comments
and feedback.
Cheers,
ved
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